16332121 has 16 divisors (see below), whose sum is σ = 18918144. Its totient is φ = 13964544.

The previous prime is 16332119. The next prime is 16332137. The reversal of 16332121 is 12123361.

It is a cyclic number.

It is not a de Polignac number, because 16332121 - 2¹ = 16332119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16332161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14256 + ... + 15358.

It is an arithmetic number, because the mean of its divisors is an integer number (1182384).

Almost surely, 2^16332121 is an apocalyptic number.

It is an amenable number.

16332121 is a deficient number, since it is larger than the sum of its proper divisors (2586023).

16332121 is a wasteful number, since it uses less digits than its factorization.

16332121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200.

The product of its digits is 216, while the sum is 19.

The square root of 16332121 is about 4041.3018941920. The cubic root of 16332121 is about 253.7158094145.

Adding to 16332121 its reverse (12123361), we get a palindrome (28455482).

The spelling of 16332121 in words is "sixteen million, three hundred thirty-two thousand, one hundred twenty-one".